Permanent failure monitoring in complex systems

• US 6,216,243 B1
• Filed: 03/30/1998
• Issued: 04/10/2001
• Est. Priority Date: 05/28/1997
• Status: Expired due to Term

• Current Assignee: Advantest Corporation
• Original Assignee: HP Inc.
• Inventors: Wittrodt, Peter
• Primary Examiner(s): Decady, Albert
• Assistant Examiner(s): Chase, Shelly A
• Application Number:
  US09/050,505
• Time in Patent Office: 1,107 Days
• Field of Search: 714/734, 714/742, 714/724, 714/25, 714/733, 714/30, 714/47, 714/46, 714/26, 702/121, 324/73
• US Class Current: 714/734
• CPC Class Codes: G01R 31/31907 Modular tester, e.g. controlling and coordinating instruments in a bus based architecture
• CPC Class Codes: G06F 11/0709 in a distributed system consisting of a plurality of standalone computer nodes, e.g. clusters, client-server systems
• CPC Class Codes: G06F 11/0751 Error or fault detection not based on redundancy power supply failures G06F1/30; network fault management H04L41/06
• CPC Class Codes: G06F 11/22 Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
• CPC Class Codes: G06F 11/26 Functional testing
• CPC Class Codes: G06F 11/2736 using a dedicated service processor for test
• CPC Class Codes: G06F 11/3006 where the computing system is distributed, e.g. networked systems, clusters, multiprocessor systems multiprogramming arrangements G06F9/46; allocation of resources G06F9/50
• CPC Class Codes: G06F 11/3013 where the computing system is an embedded system, i.e. a combination of hardware and software dedicated to perform a certain function in mobile devices, printers, automotive or aircraft systems testing or monitoring of control systems or parts thereof G05B23/02
• CPC Class Codes: G06F 11/3048 where the topology of the computing system or computing system component explicitly influences the monitoring activity, e.g. serial, hierarchical systems
• CPC Class Codes: G06F 11/3058 Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations thermal management in cooling arrangements of a computing system G06F1/206
• CPC Class Codes: G06F 11/3082 the data filtering being achieved by aggregating or compressing the monitored data

Abstract

Described is a system with a plurality of subsystems, wherein at least one of the plurality of subsystems comprises one or more monitoring points relevant and representative for certain parameters of the respective subsystem, each one of the one or more monitoring points is connected with a respective diagnosis module for substantially permanently monitoring the respective monitoring point, and an evaluation unit is connected with each respective diagnosis module for receiving information therefrom about each respective monitoring point, and for evaluating the received information in order to draw conclusions about parameters and properties within the system. The system is preferably used in an automated test equipment system.

Claims

1. An automated test equipment system for testing a system with a plurality of subsystems, wherein:

the plurality of subsystems include one or more monitoring points for monitoring and manifesting certain parameters of the respective subsystem;

a plurality of diagnosis modules, each diagnosis module operationally independent of other of said diagnosis modules so as to remain operative in the event of a malfunction thereof, said diagnosis modules further coupled so as to enable communications therebetween at least upon an occurrence of an event;

each one of the one or more monitoring points connected with a respective diagnosis module to enable each said respective diagnosis module to substantially permanently monitor the respective monitoring point for said parameters manifested thereby; and

an evaluation unit connected with each respective diagnosis module for receiving information therefrom about each respective monitoring point, and for evaluating the received information in order to draw conclusions about parameters and properties within the system.

2. The system according to claim 1, wherein each one of the one or more monitoring points manifests a parameter that is representative of the functionality of at least one of the respective subsystems or of the functionality of the entire system.

3. The system according to claim 1, wherein each respective diagnosis module is coupled by a communication channel with the evaluation unit.

4. The system according to claim 1, wherein the evaluation unit is controlled by a software program which is executed substantially permanently and in parallel to other running programs or tasks within the system.

5. The system according to claim 1, wherein the evaluation unit comprises a signaling unit for signaling in case that the evaluation unit observes a failure occurring or when an observed parameter of the system tends to drift.

6. The system according to claim 1, wherein said diagnosis modules periodically dispatch signals, monitored by at least one of said evaluation unit or said diagnosis modules, that indicate that the respective diagnosis modules are alive and functional.

7. The system according to claim 1, wherein the event is an occurrence of a measured parameter reaching a predetermined limit condition.

8. A method for discovering failures in a system with a plurality of subsystems, wherein at least one of the plurality of subsystems comprises one or more monitoring points for monitoring and manifesting certain parameters of the respective subsystems, a plurality of diagnosis modules, each diagnosis module operationally independent of other of said diagnosis modules so as to remain operative in the event of a malfunction thereof, said diagnosis modules further coupled so as to enable communications therebetween at least upon an occurrence of an event, and an evaluation unit connected with each respective diagnosis module;

the method comprising the steps of;

operating said diagnosis modules to substantially permanently monitor the respective monitoring points for parameters manifested thereby;

receiving information from each respective diagnosis module about each respective monitoring point, and

controlling the evaluation unit with a software program that is executed substantially permanently and in parallel to other running programs or tasks within the system so as to enable evaluation of the received information in order to draw conclusions about parameters and properties within the system.

9. The method according to claim 8 comprising a step of signaling in case that the evaluation unit observes that a failure is occurring or when an observed parameter of the system tends to drift.

10. The method according to claim 8, wherein the event is an occurrence of a measured parameter reaching a predetermined limit condition.

11. The method according to claim 8, further comprising the steps of:

periodically dispatching signals from each respective diagnosis module that indicate that the respective diagnosis module is alive and functional; and

monitoring said dispatched signals at least one of said evaluation unit or said diagnosis modules.

12. An automated test equipment system for testing a system with a plurality of subsystems, wherein:

the plurality of subsystems include one or more monitoring points for monitoring and manifesting certain parameters of the respective subsystem;

a plurality of diagnosis modules, each diagnosis module operationally independent of other of said diagnosis modules so as to remain operative in the event of a malfunction thereof, said diagnosis modules further coupled so as to enable communications therebetween, and wherein said diagnosis modules periodically dispatch signals, monitored by at least one of said evaluation unit or said diagnosis modules, that indicate that the respective diagnosis modules are alive and functional;

each one of the one or more monitoring points connected with a respective diagnosis module to enable each said respective diagnosis module to substantially permanently monitor the respective monitoring point for said parameters manifested thereby; and

an evaluation unit connected with each respective diagnosis module for receiving information therefrom about each respective monitoring point, and for evaluating the received information in order to draw conclusions about parameters and properties within the system.